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LakeQuality
C

Wp22-T6a Lake

Douglas County, WisconsinLimited DataMesotrophic

Wp22-T6a Lake earns a C — middle-of-the-pack water quality, with one or two parameters dragging the average down from a stronger grade. Sub-grades cluster within a single letter of each other, which usually means the lake is in stable trophic balance rather than fighting one specific stressor.

A TSI near 48 places Wp22-T6a Lake in the mesotrophic band — moderate productivity, with seasonal swings between clearer spring water and richer late-summer conditions. The lake's maximum depth is not yet documented in state morphometric records — context for its physical structure remains limited. The lake's surface area is not consistently recorded across state datasets — physical context remains partial. Wp22-T6a Lake sits at rank 30 of 40 in Douglas County, in the lower half of the local distribution.

No invasive species are currently listed at Wp22-T6a Lake — the lake remains off the Wisconsin infested-waters roster. The state fisheries records do not list documented species for Wp22-T6a Lake, which usually reflects a lack of formal fisheries survey work rather than an empty lake. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.

Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2022-06-20. Grade methodology: LakeGrade methodology.

Swimming Safety

Generally safe for swimming, moderate water quality

Water Quality Grade: C, Fair

Moderate clarity, visible to about 7.5 ft. Trophic State Index: 48.

MetricValueGrade
Water Clarity (Secchi Depth)7.5 ftC
PhosphorusNo data
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)48Mesotrophic

Moderate nutrients, good water quality

Water Quality Trend: Stable

Based on 5 years of monitoring data (2020-2025).

MetricTrendChange/YearYears
Water Clarity Declining-8.82 m/yr2
Phosphorus Improving-0.46 µg/L/yr5

Location

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County Ranking

Ranked #30 of 40 lakes in Douglas County

Nearby Lakes in Douglas County

Data Sources

Water quality data from the EPA Water Quality Portal

Grading methodology based on Metropolitan Council standards

Fish and recreation data from Wisconsin DNR Lakes

Most recent sample: 2022-06-20

Monitoring stations: 1